Replacing The Rate/Reset Valve Assembly (4195Kc Series) - Emerson Fisher KC Series Instruction Manual

4195KA, KB, KC, and KS Controllers
8. Set the reset adjustment to 0.01 minutes per
repeat.
9. Apply the proper supply pressure to the
controller, cap the nozzle and check for leaks.
Remove the supply pressure.
10. Position the controller assembly in the case and
start, but do not tighten the nine mounting screws.
Slide the controller assembly down to assure an
O-ring seal at the pressure connections along the
bottom of the case. Hold the controller assembly in
place while tightening the nine mounting screws.
11. Perform the controller calibration procedures
and, if necessary, the appropriate remote set point
calibration procedure in Section 4.
12. Mount the controller as described in the
Installation section.
13. Connect the external piping to the controller.
Replacing the Rate/Reset Valve
Assembly (4195KC Series)
WARNING
Refer to the Maintenance WARNING
on page 6-1.
Read this entire procedure before
removing any parts. Refer to the
4195KC Series portion of figure 7-1 for
key number locations.
1. Remove the controller assembly from the case
by performing steps 1 through 3 of the case and
cover replacement procedure.
2. Remove the two machine screws (key 71) on the
side of the rate/reset valve assembly (key 262).
3. Gently pull the rate tubing assembly away from
the rate/reset assembly and, remove the gasket (key
5) from the side of the rate/reset assembly.
4. Unscrew the nut holding the reset tubing
assembly (key 43) into the rate/reset valve
assembly.
5. Unscrew the nut holding the proportional tubing
assembly (key 40) into the rate/reset assembly.
6. For controllers with anti-reset windup (suffix letter
F), unscrew the nut holding the relief tubing
assembly (key 44) into the rate/reset assembly.
6-18
Note
7. While holding the rate/reset valve assembly,
remove the machine screw (key 162) from the
frame.
8. Remove the rate/reset valve assembly from the
frame.
9. Inspect and, if necessary, replace the gasket
(key 5).
10. To install the replacement rate/reset valve
assembly, position the assembly on the frame (key
3) and secure it with the mounting screw (key 162).
11. Position the gasket (key 5) on the rate/reset
valve assembly. Hold the gasket in place while
installing the rate tubing assembly (key 137) on the
valve assembly using the two machine screws (key
71).
12. Insert the reset tubing assembly (key 43) into
the rate/reset valve assembly and tighten the nut.
13. Insert the proportional tubing assembly (key 40)
into the rate/reset valve assembly and tighten the
nut.
14. For controllers with anti-reset windup (suffix
letter F), insert the relief tubing assembly (key 44)
into the rate/reset valve assembly and tighten the
nut.
15. Set the reset to 0.01 minutes per repeat and the
rate to OFF.
16. Apply the proper supply pressure to the
controller and check for leaks. Remove the supply
pressure.
17. Position the controller assembly in the case and
start, but do not tighten the nine mounting screws.
Slide the controller assembly down to assure an
O-ring seal at the pressure connections along the
bottom of the case. Hold the controller assembly in
place while tightening the nine mounting screws.
18. Perform the controller calibration procedures
and, if necessary, the appropriate remote set point
calibration procedure in Section 4.
19. Mount the controller as described in the
Installation section.
20. Connect the external piping to the controller.
Instruction Manual
Form 5207
April 2007